455 entries under adjective topic. ×
| firm(noun, feature, state, characteristic) | |
| consistent(strong, strain, flat, certain) | |
| strong(tough, strain, flat, firm) | |
| stable(strong, tough, strain, flat) | |
| hard(feature, state, characteristic, strain) | |
| sound(strain, firmness, labour, hardiness) | |
| stiff(feature, state, characteristic, strain) | |
| unfluctuating(strain, steady, regular, firmness) | |
| constant(strong, tough, continue, strain) | |
| steadfast(feature, state, characteristic, strong) | |
| steady(feature, state, characteristic, strong) | |
| enduring(quiet, strong, tough, continue) | |
| perpetual(continue, strain, determined, usual) | |
| lasting(strong, tough, continue, strain) | |
| permanent(strong, tough, continue, strain) | |
| unyielding(strong, tough, strain, flat) | |
| durable(continue, strain, stable, firmness) | |
| rigid(feature, state, characteristic, severe) | |
| invariable(strain, certain, stable, regular) | |
| lingering(continue, strain, firmness, labour) |
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| APA | Smart Define. (2015). persistent thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, persistent thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>. |
| MLA | Smart Define. "persistent thesaurus" 1 June 2015. Web. 20 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms> |